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RELATED PARTY TRANSACTIONS - Related Party Balances (Details) - Related party - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Related Party Transaction [Line Items] |  |
Receivables due from related parties | $ 786 | $ 60
Payables due to related parties | (384) | (328)
Seatankers Management Norway AS |  |
Related Party Transaction [Line Items] |  |
Receivables due from related parties | 0 | 16
Paratus Management (UK) Limited |  |
Related Party Transaction [Line Items] |  |
Receivables due from related parties | 8 | 0
Seatankers Services (UK) LLP |  |
Related Party Transaction [Line Items] |  |
Receivables due from related parties | 9 | 0
Frontline Cyprus Ltd |  |
Related Party Transaction [Line Items] |  |
Receivables due from related parties | 8 | 0
Frontline Management (Bermuda) Limited |  |
Related Party Transaction [Line Items] |  |
Receivables due from related parties | 510 | 0
Northern Ocean Limited |  |
Related Party Transaction [Line Items] |  |
Receivables due from related parties | 0 | 33
Avance Gas Trading Ltd |  |
Related Party Transaction [Line Items] |  |
Receivables due from related parties | 232 | 2
Sloane Square Capital Holdings Ltd |  |
Related Party Transaction [Line Items] |  |
Receivables due from related parties | 19 | 9
Frontline Management (Bermuda) Limited |  |
Related Party Transaction [Line Items] |  |
Payables due to related parties | 0 | (30)
Frontline Corporate Services Ltd |  |
Related Party Transaction [Line Items] |  |
Payables due to related parties | (26) | (4)
Flex LNG Fleet Management AS |  |
Related Party Transaction [Line Items] |  |
Payables due to related parties | (358) | (293)
SFL Corporation Ltd |  |
Related Party Transaction [Line Items] |  |
Payables due to related parties | $ 0 | $ (1)

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